On Tue Feb 11, 2020 at 11:23 AM, Andrii Nakryiko wrote: > On Mon, Feb 10, 2020 at 12:09 PM Daniel Xu <dxu@xxxxxxxxx> wrote: [...] > > + * int bpf_read_branch_records(struct bpf_perf_event_data *ctx, void *buf, u32 size, u64 flags) > > + * Description > > + * For an eBPF program attached to a perf event, retrieve the > > + * branch records (struct perf_branch_entry) associated to *ctx* > > + * and store it in the buffer pointed by *buf* up to size > > + * *buf_size* bytes. > > + * Return > > + * On success, number of bytes written to *buf*. On error, a > > + * negative value. > > + * > > + * The *flags* can be set to **BPF_F_GET_BRANCH_RECORDS_SIZE** to > > + * instead return the number of bytes required to store all the > > + * branch entries. If this flag is set, *buf* may be NULL. > > + * > > + * **-EINVAL** if arguments invalid or **buf_size** not a multiple > > > buf_size -> size Whoops, thanks for catching. [...]
